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00925njm 22002777a 4500 dc Varas Muriel, María Josefa author Pérez-Monserrat, Elena Mercedes author Vázquez Calvo, María del Carmen author Fort González, Rafael author 2015 Preliminary studies are an imperative when determining the impact of conservation treatments on historical materials. The Romanesque apse on a church at Talamanca de Jarama, Madrid, Spain, whose dolostone was severely decayed by rainwater and salts, was treated in the past with substances that ravaged the restored area. Petrological techniques showed that salts leached out of the cement under the roof onto the stone cornice whose surface had been coated with synthetic resins. During evaporation, the salts precipitated in the stone and underneath the resin, inducing blistering, fissuring, flaking, scaling and detachment of part of the restored decorative elements. 0950-0618 10.1016/j.conbuildmat.2015.07.087 https://hdl.handle.net/20.500.14352/35648 https://www.journals.elsevier.com/construction-and-building-materials/ Effect of conservation treatments on heritage stone. Characterisation of decay processes in a case study